CONVENIENTLY PREPARED NAPHTHALENE AND PERYLENE DERIVATIVES AS BUILDING BLOCKS FOR ORGANIC ELECTRONIC MATERIALS AND DYESTUFF
申请人:BASF SE
公开号:US20150225418A1
公开(公告)日:2015-08-13
The present invention provides the compounds of formulae (3) and (1), wherein n is 0 or 1, R
11
and R
12
are the same and are selected from the group consisting of CN, OR
300
, Si(R
301
)
3
, NHR
302
, NR
303
R
304
, SR
305
and R
306
, or R
11
and R
12
together are selected from the group consisting of (a), (b), and (c) and X is Cl, Br or I, and a process for the preparation of compounds of formula (3) comprising the compounds of formula (1) as key intermediates.
Integrating pyracylene and naphthalenediimides into planar structures: Synthesis and characterization
作者:Xiaoping Cui、Guowei Zhang、Lei Zhang、Zhaohui Wang
DOI:10.1016/j.dyepig.2019.04.070
日期:2019.9
naphthalenediimides alternately fused on the five-membered rings in pyracylene units, through one-step crossing-coupling-cyclization cascade reaction, are reported. This fusion pattern allows to a planar backbone and enhances the aromatic character of pyracylene. Electrochemical experiments reveal that the electronic communication occurs between the adjacent NDI redox centers, resulting in multiple
The synthesis of multiply substituted acenes is still a relevant research problem, considering their applications and future potential. Here we present an elegant synthetic protocol to afford tetra-peri-substituted naphthalene and tetracene from their tetrahalo derivatives by a Pd(0)-catalyzed C-C cross-coupling method in a single step. The newly synthesized tetracenes were characterized by NMR, HRMS
考虑到其应用和未来潜力,多取代并苯的合成仍然是一个相关的研究问题。在这里,我们提出了一种优雅的合成方案,通过 Pd(0) 催化的 CC 交叉偶联方法一步即可从四卤代衍生物中获得四邻位取代的萘和并四苯。新合成的并四苯通过核磁共振、高分辨质谱、紫外可见分光光度法和单晶 X 射线衍射 (SCXRD) 进行了表征。此外,这里还报道了硫属苯基取代对双苯手性光学性质影响的首次系统计算研究。
Unsymmetrization of 1,8-Dibromonaphthalenes by Acid-Induced Halogen Dance Reaction
作者:Kento Iwai、Nagatoshi Nishiwaki
DOI:10.1021/acs.joc.4c00507
日期:2024.6.7
affording 1,7-dibromonaphthalene upon treatment with trifluoromethanesulfonic acid (halogen dance reaction). For 1,4,5,8-tetrabromonaphthalene, stepwise 1,2-rearrangements proceeded successively to furnish 1,3,5,7-tetrabromonaphthalene. Density functional theory calculations suggest that this reaction is initiated by ipso-protonation, with a subsequent 1,2-rearrangement occurring via the bromonium
The narrowest armchair graphene nanoribbon (AGNR) with five carbons across the width of the GNR (5-AGNR) was synthesized on Au(111) surfaces via sequential dehalogenation processes in a mild condition by using 1,4,5,8-tetrabromonaphthalene as the molecular precursor. Gold-organic hybrids were observed by using high-resolution scanning tunneling microscopy and considered as intermediate states upon AGNR formation. Scanning tunneling spectroscopy reveals an unexpectedly large band gap of Delta = 2.8 +/- 0.1 eV on Au(111) surface which can be interpreted by the hybridization of the surface states and the molecular states of the 5-AGNR.